| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 35.59 | 170 |
| 2014 | 37.56 | 175 |
| 2013 | 34.15 | 181 |
| 2012 | 30.64 | 183 |
| 2011 | 30.39 | 188 |
| 2010 | 28.61 | 185 |
| 2009 | 24.49 | 187 |
| 2008 | 34.4 | 184 |
| 2007 | 33.09 | 185 |
| 2006 | 30.33 | 185 |
| 2005 | 26.52 | 185 |
| 2004 | 23.92 | 187 |
| 2003 | 21.58 | 187 |
| 2002 | 20.69 | 186 |
| 2001 | 19.8 | 181 |
| 2000 | 19.82 | 181 |
| 1999 | 18.35 | 180 |
| 1998 | 19.23 | 179 |
| 1997 | 20.04 | 178 |
| 1996 | 18.52 | 177 |
| 1995 | 16.68 | 175 |
| 1994 | 16.1 | 171 |
| 1993 | 16.01 | 165 |
| 1992 | 17.51 | 164 |
| 1991 | 18.28 | 159 |
| 1990 | 19.79 | 151 |
| 1989 | 19.1 | 139 |
| 1988 | 17.5 | 135 |
| 1987 | 17.44 | 134 |
| 1986 | 18.44 | 130 |